F: Mathematics & Decision (359)
GJSFR: F
Global Exponential Stability of Impulsive Functional Differential Equations with Effect of Delay at the Time of Impulses
Published In: GJSFR Part: F: Mathematics & Decision Volume: 15 Issue: 8 This paper studies the global exponential stability of impulsive functional differential system with the effect of delay at the time of impulses by using Lyapunov functions and Razumikhin technique. This result extends some results existing in the literature. The obtained result also shows that the derivative of Lyapunov function may not be negative even then impulses can make the system...
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Authors Palwinder Singh, Kanwalpreet Kaur , Sanjay K. SrivastavaRead Journal Click Here
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Page No. 15 to 21
Thermomechanical Response of Transversely Isotropic Thermoelastic Solids with Two Temperature and Without Energy Dissipation Due to Time Harmonic Sources
Published In: GJSFR Part: F: Mathematics & Decision Volume: 15 Issue: 7 The paper is concerned with two dimensional deformation in a homogeneous, transversely isotropic thermoelastic solids without energy dissipation and with two temperatures due to various sources. Assuming the disturbances to be harmonically time-dependent, the transformed solution is obtained in the frequency domain. The application of a time harmonic concentrated and distributed sources ...
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Authors Nidhi Sharma, Rajneesh Kumar, Parveen LataRead Journal Click Here
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Page No. 69 to 82
A Robust Regression Type Estimator for Estimating Population Mean under Non-Normality in the Presence of Non-Response
Published In: GJSFR Part: F: Mathematics & Decision Volume: 15 Issue: 7 In sampling theory, regression type estimators are extensively used to estimate the population mean when the correlation between study and auxiliary variables is high. In this study, we incorporate robust modified maximum likelihood estimators (MMLEs) into regression type estimator in the presence of non-response and their properties have been obtained theoretically. For the support of t...
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Authors Sanjay KumarRead Journal Click Here
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Page No. 43 to 55
Non-local Solution of Mixed Integral Equation with Singular Kernel
Published In: GJSFR Part: F: Mathematics & Decision Volume: 15 Issue: 7 In this paper, we consider a non-local mixed integral equation in position and time in the space 2 L 1,1 C 0,T ;T. Then, using a quadratic numerical method, we have a system of Fredholm integral equations (SFIEs), where the existence of a unique solution is considered. Moreover, we consider Product Nystrom method (PNM), as a famous method to solve the singular integral equations, to obta...
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Authors Mohamed Abdou, Sameha Raad,Wafaa WahiedRead Journal Click Here
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Page No. 57 to 67
One Factor Analysis of Variance and Dummy Variable Regression Models
Published In: GJSFR Part: F: Mathematics & Decision Volume: 15 Issue: 7 This paper proposes and presents a method that would enable the use of dummy variable regression techniques for the analysis of sample data appropriate for analysis with the traditional one factor analysis of variance techniques with one, equal and unequal replications per treatment combination. The proposed method, applying the extra sum of squares principle develops F ratio-test statis...
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Authors Oyeka ICA, Okeh UMRead Journal Click Here
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Page No. 1 to 11
Simultaneous Estimation of Adjusted Rate of Two Factors using Method of Direct Standardization
Published In: GJSFR Part: F: Mathematics & Decision Volume: 15 Issue: 7 This paper presents the use of standardization or adjustment of rates and ratios in comparing two populations using single indices rather than a series of specific rates or ratios. Here the overall adjusted crude rate or the unadjusted crude rate for two populations will have same estimate irrespective of the nature of the standard population distribution. These results are obtained in a...
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Authors Oyeka ICA, Okeh UMRead Journal Click Here
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Page No. 37 to 42
Generalized Class of Exponential Chain Ratio-cum-Chain Product Type Estimator for Finite Population Mean under Double Sampling Scheme in Presence of Non-Response
Published In: GJSFR Part: F: Mathematics & Decision Volume: 15 Issue: 7 In this paper, a generalized class of exponential chain ratio-cum-chain product type estimator has been developed for estimating finite population mean and its properties have been studied in presence of non-response. The expressions for the bias and mean square error of the proposed estimator have been obtained in two different cases of non-response. The theoretical and empirical studie...
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Authors Yater Tato, B.K. SinghRead Journal Click Here
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Page No. 23 to 35
On Certain Type Fractional Integration of Special Functions via Pathway Operator
Published In: GJSFR Part: F: Mathematics & Decision Volume: 15 Issue: 8 In this present paper we study product of some special functions via pathway fractional integral operator. Our results are quite general in nature .Some known and new results are also obtain here. ...
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Authors Hemlata Saxena, Rajendra SaxenaRead Journal Click Here
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Page No. 1 to 6
On Non-Invariant Hypersurfaces of δ-Lorentzian Trans-Sasakian Manifolds
Published In: GJSFR Part: F: Mathematics & Decision Volume: 15 Issue: 6 The object of the present paper is to study non-invariant Hypersurfaces of ð›¿ð›¿âˆ’ Lorentzian trans-Sasakian Manifolds equipped with (f; g; u; v; )− structure and some properties obeyed by this structure are obtained also. The necessary and sufficient conditions have been otained for totally umbilical non-invariant hypersur...
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Authors Puneet Kumar Gupt, Shyam KishorRead Journal Click Here
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Page No. 37 to 43
Robustness of Sequential Test for the Scale Parameter of Nakagami Distribution
Published In: GJSFR Part: F: Mathematics & Decision Volume: 15 Issue: 8 In the present study, Sequential Probability Ratio Test (SPRT) is developed for the scale parameter of Nakagami Distribution and the robustness of scale parameter is studied when the shape parameter has undergone a change, for testing the hypothesis regarding the parameter of Nakagami Distribution. The expression for the Operating Characteristic (OC) and Average Sample Number (ASN) funct...
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Authors Surinder Kumar, Mayank VaishRead Journal Click Here
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Page No. 7 to 13
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Numerical Investigation of the Stability of Equilibrium Points for the Model of Three Mutually Competing, Symmetric and Continuous Time Reproducing Organism in a Fairly Stable Ecological Environment
Published In: GJSFR Part: F: Mathematics & Decision Volume: 15 Issue: 6 In this paper, we examined the stability of the equilibrium points for the model of three mutually competing species within a stable ecosystem. For the stable ecosystem, we proposed that there are combinations of initial population densities and efficiency parameters that can balance the coexistence of these species for a very long time. This desirable biological property of a stable non...
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Authors Dr. A.A. Obayomi, Dr. M.O. OkeRead Journal Click Here
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Page No. 27 to 35
Discriminant Analysis by Projection Pursuit
Published In: GJSFR Part: F: Mathematics & Decision Volume: 15 Issue: 6 A non-parametric discriminant analysis (projection pursuit by principal component analysis) is discussed and used to compare three robust linear discriminant functions that are based on high breakdown point (of location and covariance matrix ) estimators. The major part of this paper deals with practical application of projection pursuit by principal component. In this study 10 simulated...
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Authors Okonkwo, Evelyn Nkiruka, Onyeagu, Sidney, Okeke, Joseph UchennaRead Journal Click Here
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Page No. 11 to 16
Existence of Solution of First Order Differential Balance Equation in Interpolation
Published In: GJSFR Part: F: Mathematics & Decision Volume: 15 Issue: 6 In this paper I derive the formula from the first order differential balance equation. In Numerical methods we are finding the missing values and derivativs from the available data by using different formula. One can solve problem directly using balance equation. ...
Harmonic Univalent Function with Varying Arguments Defined by using Salagean Integral Operator with Fixed Point
Published In: GJSFR Part: F: Mathematics & Decision Volume: 15 Issue: 6 In this paper authors study a new class of harmonic functions defined by using Salagean Integral operator with varying arguments. We obtain coefficient inequalities, extreme points and distortion bounds. ...
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Authors Dr.Poonam Dixit, Nikhil Kumar, Puneet ShuklaRead Journal Click Here
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Page No. 17 to 25